--- title: "Louisville (SDF) to Boston (BOS) flights: who flies it" description: "American Airlines and Delta Air Lines fly nonstop from SDF to BOS, about 24 flights a week. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/sdf-bos" url: "https://2lnr.com/routes/sdf-bos.md" date_modified: "2026-10-18T05:10:47Z" --- # Louisville to Boston (SDF-BOS): nonstop upgrade & award space American Airlines and Delta Air Lines fly nonstop between Louisville (SDF) and Boston (BOS), roughly 24 times a week. The timetable below shows the nonstop scheduled at 2h 24m to 2h 37m for the 827 miles. 2LNR checks confirmed upgrade and award space on American Airlines and Delta Air Lines flights on this route, so you can see which departures have space before you book. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See SDF to BOS on the interactive map [Get started free](https://2lnr.com/login) 24 Flights a week, 4-week average 2h 24m to 2h 37m Scheduled flight time 827 mi Nonstop distance Free To get started ## Louisville to Boston flight schedule Scheduled nonstop departures for SDF to BOS starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Louisville (SDF) to Boston (BOS) | Date | Flight | Airline | Departs SDF | Arrives BOS | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | DL 5615 | Delta Air Lines | 13:20 | 15:57 | 2h 37m | [Embraer E175](https://2lnr.com/seatmaps/dl/e175.md) | | Fri, Oct 23 | AA 4685 | American Airlines | 17:00 | 19:30 | 2h 30m | [Embraer E175](https://2lnr.com/seatmaps/aa/e175.md) | | Fri, Oct 23 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | | Sat, Oct 24 | AA 3585 | American Airlines | 14:30 | 16:55 | 2h 25m | Embraer E175 | | Sat, Oct 24 | DL 5615 | Delta Air Lines | 14:35 | 17:11 | 2h 36m | Embraer E175 | | Sun, Oct 25 | DL 5615 | Delta Air Lines | 15:39 | 18:16 | 2h 37m | Embraer E175 | | Sun, Oct 25 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | | Mon, Oct 26 | DL 5615 | Delta Air Lines | 13:20 | 15:57 | 2h 37m | Embraer E175 | | Mon, Oct 26 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | | Tue, Oct 27 | DL 5615 | Delta Air Lines | 13:20 | 15:57 | 2h 37m | Embraer E175 | | Tue, Oct 27 | AA 4685 | American Airlines | 17:00 | 19:30 | 2h 30m | Embraer E175 | | Tue, Oct 27 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | | Wed, Oct 28 | DL 5615 | Delta Air Lines | 13:20 | 15:57 | 2h 37m | Embraer E175 | | Wed, Oct 28 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | | Thu, Oct 29 | DL 5615 | Delta Air Lines | 13:20 | 15:57 | 2h 37m | Embraer E175 | | Thu, Oct 29 | AA 4685 | American Airlines | 17:00 | 19:30 | 2h 30m | Embraer E175 | | Thu, Oct 29 | AA 3961 | American Airlines | 18:08 | 20:32 | 2h 24m | Embraer E175 | Showing all 17 scheduled SDF to BOS departures across 7 days with service, starting October 23, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every SDF to BOS date on the interactive map ## Aircraft on the Louisville to Boston nonstop In the schedule table on this page, American Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/aa/e175.md), and Delta Air Lines flies the [Embraer E175](https://2lnr.com/seatmaps/dl/e175.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on SDF to BOS departures 2LNR tracks confirmed upgrade and award space on American Airlines and Delta Air Lines, segment by segment and date by date. Open the calendar for Louisville to Boston to see which departures have space, the next 14 days free on every product and the full horizon on Pro. In the 7 days to October 19, 2026, 2LNR checked award space on Louisville to Boston departures from October 19 to November 1. American Airlines had space open on 8 of 14 dates checked and Delta Air Lines on 10 of 13. ### See real availability Confirmed upgrade or award seats by date on the SDF to BOS departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See SDF to BOS on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Louisville to Boston nonstop Carriers operating SDF to BOS nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [American Airlines (AA) route map](https://2lnr.com/routes/airlines/aa.md)\ [The aircraft AA flies](https://2lnr.com/seatmaps/aa.md) - [Delta Air Lines (DL) route map](https://2lnr.com/routes/airlines/dl.md)\ [The aircraft DL flies](https://2lnr.com/seatmaps/dl.md) See SDF to BOS on the interactive map → ## Frequently asked questions about SDF to BOS **How long is the flight from Louisville (SDF) to Boston (BOS)?** Scheduled flight times from Louisville (SDF) to Boston (BOS) run from 2h 24m to 2h 37m across the departures in the schedule table on this page. The nonstop covers about 827 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from SDF to BOS?** American Airlines and Delta Air Lines fly SDF to BOS nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines and Delta Air Lines. **How many flights a week are there from SDF to BOS?** About 24 nonstop flights a week run between Louisville (SDF) and Boston (BOS) in the current schedule, operated by American Airlines and Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from SDF to BOS depart?** Scheduled SDF to BOS nonstops in the next 7 days with service leave between 13:20 and 18:08, local time at Louisville. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate SDF to BOS nonstop?** In the schedule table on this page, SDF to BOS nonstops fly as AA 3585, AA 3961, and AA 4685 on American Airlines, and DL 5615 on Delta Air Lines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on SDF to BOS?** Open the SDF to BOS route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines and Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens. Flying the other way? See [BOS to SDF upgrade and award space](https://2lnr.com/routes/bos-sdf.md). Award seats rather than schedules? See [American Airlines award availability](https://2lnr.com/awards/aa.md) or [Delta Air Lines award availability](https://2lnr.com/awards/dl.md). Looking beyond this route? See [every route from Louisville (SDF)](https://2lnr.com/routes/sdf.md), or [every route from Boston (BOS)](https://2lnr.com/routes/bos.md). Nonstops to Boston (BOS) from other airports within 150 miles of Louisville (SDF): - [Lexington (LEX) to Boston (BOS)](https://2lnr.com/routes/lex-bos.md), 62 miles from SDF - [Cincinnati (CVG) to Boston (BOS)](https://2lnr.com/routes/cvg-bos.md), 84 miles from SDF - [Indianapolis (IND) to Boston (BOS)](https://2lnr.com/routes/ind-bos.md), 111 miles from SDF Distances are great-circle between the airports, not driving distance. - [How American upgrades clear](https://2lnr.com/about/aa/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss SDF to BOS upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)